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Draft implementation of Snapshots, with saving and UI

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brunoherbelin
2021-04-17 10:28:12 +02:00
parent 2d4a6d1fe6
commit ebb5fd16bb
13 changed files with 116 additions and 34 deletions
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73
ActionManager.cpp
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@@ -1,5 +1,6 @@
#include <string>
#include <algorithm>
#include <sstream>
#include "Log.h"
#include "View.h"
@@ -18,25 +19,45 @@
#define ACTION_DEBUG
#endif
#define HISTORY_NODE(i) std::to_string(i).insert(0, "H").c_str()
#define SNAPSHOT_NODE(i) std::to_string(i).insert(0, "S").c_str()
using namespace tinyxml2;
Action::Action(): history_step_(0), history_max_step_(0)
{
}
void Action::clear()
void Action::init(const std::string &xml)
{
// clean the history
history_doc_.Clear();
history_step_ = 0;
history_max_step_ = 0;
// start fresh
store("Session start");
// clean the snapshots
snapshots_doc_.Clear();
snapshots_.clear();
// start fresh
store("Session start");
if ( !xml.empty() ) {
if ( XMLResultError( snapshots_doc_.Parse( xml.c_str() ) ))
Log::Info("Failed to load snapshots");
else
{
const XMLElement* N = snapshots_doc_.RootElement();
for( ; N ; N=N->NextSiblingElement()) {
char c;
u_int64_t id = 0;
std::istringstream nodename( N->Name() );
nodename >> c >> id;
snapshots_.push_back(id);
}
}
}
}
void Action::store(const std::string &label)
@@ -47,19 +68,17 @@ void Action::store(const std::string &label)
// incremental naming of history nodes
history_step_++;
std::string nodename = "H" + std::to_string(history_step_);
// erase future
for (uint e = history_step_; e <= history_max_step_; e++) {
std::string name = "H" + std::to_string(e);
XMLElement *node = history_doc_.FirstChildElement( name.c_str() );
XMLElement *node = history_doc_.FirstChildElement( HISTORY_NODE(e) );
if ( node )
history_doc_.DeleteChild(node);
}
history_max_step_ = history_step_;
// create history node
XMLElement *sessionNode = history_doc_.NewElement( nodename.c_str() );
XMLElement *sessionNode = history_doc_.NewElement( HISTORY_NODE(history_step_) );
history_doc_.InsertEndChild(sessionNode);
// label describes the action
sessionNode->SetAttribute("label", label.c_str());
@@ -76,7 +95,7 @@ void Action::store(const std::string &label)
// debug
#ifdef ACTION_DEBUG
Log::Info("Action stored %s '%s'", nodename.c_str(), label.c_str());
Log::Info("Action stored %d '%s'", history_step_, label.c_str());
// XMLSaveDoc(&xmlDoc_, "/home/bhbn/history.xml");
#endif
}
@@ -117,8 +136,7 @@ std::string Action::label(uint s) const
std::string l = "";
if (s > 0 && s <= history_max_step_) {
std::string nodename = "H" + std::to_string(s);
const XMLElement *sessionNode = history_doc_.FirstChildElement( nodename.c_str() );
const XMLElement *sessionNode = history_doc_.FirstChildElement( HISTORY_NODE(s));
l = sessionNode->Attribute("label");
}
return l;
@@ -131,8 +149,7 @@ void Action::restore(uint target)
// get history node of target step
history_step_ = CLAMP(target, 1, history_max_step_);
std::string nodename = "H" + std::to_string(history_step_);
XMLElement *sessionNode = history_doc_.FirstChildElement( nodename.c_str() );
XMLElement *sessionNode = history_doc_.FirstChildElement( HISTORY_NODE(history_step_) );
if (sessionNode) {
@@ -156,13 +173,15 @@ void Action::snapshot(const std::string &label)
if (locked_ || label.empty())
return;
// create snapshot id
u_int64_t id = GlmToolkit::uniqueId();
snapshots_.push_back(id);
// create history node
XMLElement *sessionNode = snapshots_doc_.NewElement( std::to_string(id).c_str() );
// create snapshot node
XMLElement *sessionNode = snapshots_doc_.NewElement( SNAPSHOT_NODE(id) );
snapshots_doc_.InsertEndChild(sessionNode);
// label describes the action
// label describes the snapshot
sessionNode->SetAttribute("label", label.c_str());
// get session to operate on
@@ -173,17 +192,29 @@ void Action::snapshot(const std::string &label)
for (auto iter = se->begin(); iter != se->end(); iter++, sv.setRoot(sessionNode) )
(*iter)->accept(sv);
// TODO: copy action history instead?
// debug
#ifdef ACTION_DEBUG
Log::Info("Snapshot stored %s '%s'", std::to_string(id).c_str(), label.c_str());
Log::Info("Snapshot stored %d '%s'", id, label.c_str());
// XMLSaveDoc(&xmlDoc_, "/home/bhbn/history.xml");
#endif
}
std::string Action::label(uint64_t s) const
const char *Action::snapshotsDescription()
{
// get compact string
XMLPrinter xmlPrint;
snapshots_doc_.Print( &xmlPrint );
return xmlPrint.CStr();
}
std::string Action::label(uint64_t snapshotid) const
{
std::string l = "";
const XMLElement *sessionNode = snapshots_doc_.FirstChildElement( std::to_string(s).c_str() );
const XMLElement *sessionNode = snapshots_doc_.FirstChildElement( SNAPSHOT_NODE(snapshotid) );
if (sessionNode) {
l = sessionNode->Attribute("label");
@@ -194,7 +225,7 @@ std::string Action::label(uint64_t s) const
void Action::setLabel (uint64_t snapshotid, const std::string &label)
{
// get history node of target
XMLElement *sessionNode = snapshots_doc_.FirstChildElement( std::to_string(snapshotid).c_str() );
XMLElement *sessionNode = snapshots_doc_.FirstChildElement( SNAPSHOT_NODE(snapshotid) );
if (sessionNode) {
sessionNode->SetAttribute("label", label.c_str());
@@ -204,7 +235,7 @@ void Action::setLabel (uint64_t snapshotid, const std::string &label)
void Action::remove(uint64_t snapshotid)
{
// get history node of target
XMLElement *sessionNode = snapshots_doc_.FirstChildElement( std::to_string(snapshotid).c_str() );
XMLElement *sessionNode = snapshots_doc_.FirstChildElement( SNAPSHOT_NODE(snapshotid) );
if (sessionNode) {
snapshots_doc_.DeleteChild( sessionNode );
@@ -218,7 +249,7 @@ void Action::restore(uint64_t snapshotid)
locked_ = true;
// get history node of target
XMLElement *sessionNode = snapshots_doc_.FirstChildElement( std::to_string(snapshotid).c_str() );
XMLElement *sessionNode = snapshots_doc_.FirstChildElement( SNAPSHOT_NODE(snapshotid) );
if (sessionNode) {
// actually restore